General Description Of Function; Additional Function Operation - Mitsubishi Electric LE-50PAU Instruction Manual

2. General description of function

2.1 Description of additional function operation
The eqivalent block diagram of power amplifire as tension controller for which additional function is added
to the basic function of power amplifire is as shown in page 28.
It is so configured that the winding diameter compensation function is added between the amplifire A1 and
amplifire A2.
1. Winding diameter compensation function
• If the target tensions T1,T2,T3,T4 ( for winding diameter D1 < D2
< D3 <D4 ) have been set, using the LE-5AP operator panel, it is
possible to execute the taper tension control as shown at right.
• For constant tension operation, it is possible to execute the oper-
ation at T1 of 100 ( initial value ) and T4 of 100 ( initial value ) as
they are with D1 and D4 set.
• The winding diameter D is calculated from speed / thickness or
pulse / thickness and the target tension corresponding to current
winding diameter is calculated from graph shown at right.
The calculation value multiplied by current radius will appear to be
the control output.
• It is necessary to set (D1,T1) and (D4,T4) by all means. (D2,T2)
are ignored when they are set to "0" . When T2 is set to "0" even
if D2 is set, for instance, such D2 is ignored.
• It is possible to set T1 ~ T4 to 20 ~500%, however, T4 must be set to 10% for winding and T1 must be
set ot 100% for unwinding respectively. For each winding diameter, the output will not exceed full-
scale.
• If the irregular tension setting is made, (D2,T2) and (D3,T3) are deemed not to have been set.
(D2,T2) and (D3,T3) are stored once they are set. When necessary to ignor them, reset D2 and D3 to
D1 or less, or to D4 or over. ( If T2 and T3 are set to T1 or over, or toT4 or less, they are ignored sim-
ilarly.)
2. Tension setting function
(1) Internal adjustment
• When the built-in variable resistor ( adjustable by software ) is val-
idated by the LE-5AP operator panel, it is possible to adjust the
input, using operator panel ina substitute for extrenal variable re-
sistor.
• The variable resistor adjustment procedure is shown in page 36.
(2) External variable resistor
• When the built-in variable resistor is invalidated using the
LE-5AP operator panel, and connect the external variable
resistor, the input signal is adjustable using the external
variable resistor.
The example of variable resistor connection diagram is
shown in page 35.
2kΩ
0 ~ 8V
27
Constant tension control
T
1
Taper tension
control
T
2
T
3
T
4
0
0 D D D
1 2 3
→ Winding diameter D (mm)
LE-50PAU
8V
SET
SP
built-in variable
SN
resistor
SW1=OFF
LE-50PAU
8V
SET
SP
SN
SW1=OFF
D
4